2024 Hyundai Elantra Key Fob Guide (US): Smart Key, Remote, Costs & Compatibility

The 2024 Hyundai Elantra in the United States can use more than one type of key setup depending on trim and equipment (for example, proximity Smart Key vs. a standard remote key). Because Hyundai fobs are version-specific, consumers generally find that matching the exact FCC ID and part style matters as much as the model year. Another common factor is whether the car has push-button start, which typically determines whether a Smart Key is required. This page breaks down options typically include, what to check before buying, and typical price ranges in the 2026 US market.

2 Key Types
$180-$550 Dealer Range
$40-$200 Aftermarket Range

Compatible Key Fob Types

The following key types are typically compatible with the 2024 Hyundai Elantra. Compatibility varies by trim and options.

Proximity Smart Key (Push-Button Start)

FCC ID: TQ8-FOB-4F16

A proximity ("Smart Key") communicates with the vehicle using a low-frequency proximity system plus a radio transmitter, allowing lock/unlock and starting the car with the key in a pocket or bag. On 2024 Elantra trims equipped with push-button start, this is the most common key type. The mechanical emergency key blade inside the fob is typically used for the driver door if the fob battery is dead.

Features

  • Proximity entry (keyless access)
  • Push-button start authorization
  • Alarm/panic function (varies by trim)

Buttons

unlocklockpanicremote start

Battery

CR2032

3-5 years typical typical lifespan

Dealer OEM $250-$550 Programming included
Aftermarket $70-$200 Programming separate

Programming

🏢 Dealer Required

For 2024 Elantra Smart Keys, adding or replacing a fob typically requires an authenticated scan-tool process and immobilizer registration. Consumers generally find that most DIY “on/off” procedures do not apply to proximity Smart Keys on late-model Hyundais.

⚠️ Common Issues

  • Aftermarket fob arrives with a different FCC ID or internal board revision and won’t register
  • Intermittent proximity detection due to a weak CR2032 battery or damaged fob shell/buttons

Remote Head Key / Standard Remote Key (Turn-Key Ignition trims)

FCC ID: TQ8-RKE-4F25

A standard remote key combines a mechanical ignition key with a separate remote transmitter for door locks and the alarm. This setup is typically found on Elantra configurations without push-button start. The remote portion controls locks (and sometimes trunk/panic), while the metal blade is used to start the vehicle in the ignition.

Features

  • Remote lock/unlock
  • Mechanical key for ignition start (where equipped)
  • Panic/alarm activation (varies by trim)

Buttons

unlocklockpanic

Battery

CR2032

3-5 years typical typical lifespan

Dealer OEM $180-$450 Programming included
Aftermarket $40-$140 Programming separate

Programming

🏢 Dealer Required

The remote transmitter and the immobilizer (chip in the key) are often separate programming steps on modern vehicles. Options typically include registering the remote functions and pairing the transponder/immobilizer, which may require professional scan-tool access depending on the exact Elantra configuration.

⚠️ Common Issues

  • Key starts the car but remote buttons don’t work (remote not paired or wrong frequency/FCC ID)
  • Remote works but key won’t start the car (immobilizer chip not matched/cut wrong)

Cost Comparison: Your Options

🏢

Dealership

$180-$550
  • âś“ OEM quality guaranteed
  • âś“ Programming included
  • âś“ Warranty coverage
  • âś— Higher cost
  • âś— May require appointment

Best for: Warranty coverage, guaranteed compatibility

🔧

Locksmith

$120-$380
  • âś“ Often same-day service
  • âś“ Mobile options available
  • âś“ Programming included
  • âś“ Often OEM parts
  • â–ł Verify credentials

Best for: Speed, convenience, moderate savings

📦

Aftermarket Online

$40-$200
  • âś“ Lowest cost option
  • âś“ Wide selection
  • âś— Programming not included
  • âś— Compatibility varies
  • â–ł Check return policy

Best for: DIY-capable owners, budget-conscious

Typical price ranges are influenced by key type (Smart Key vs. standard), whether an emergency key blade must be cut, and whether immobilizer registration is required. Consumers generally find aftermarket fobs can reduce the parts cost, but compatibility (FCC ID/board) and return policies matter because programming attempts may fail if the fob is the wrong version.

đź›’ Buyer's Checklist

Before purchasing a replacement key fob for your 2024 Hyundai Elantra, verify these points:

1 Verify the FCC ID matches your current key (printed on the back or inside the shell)
2 Confirm whether the vehicle has push-button start (Smart Key) or a turn-key ignition (remote head key)
3 Match the button layout and features (remote start, trunk, panic) to what the car is equipped to support
4 Confirm the listing is for the United States market (frequency and certification differ from other regions)
5 Plan for cutting/programming: a replacement fob may be uncut and unpaired even if it physically matches

⚠️ Common Mistakes to Avoid

âś—

Buying a look-alike fob with a different FCC ID or board revision and assuming it will program

âś—

Assuming “remote start” will work just because the fob has the button (the vehicle must be equipped and the fob must match)

âś—

Replacing the fob when the issue is only a weak CR2032 battery or dirty/damaged battery contacts

Related Model Years

Key fob compatibility often spans multiple model years. These years typically share similar key systems:

2021 2022 2023 2024

Frequently Asked Questions

Does the 2024 Hyundai Elantra use a Smart Key or a standard key fob?

Options typically include a proximity Smart Key for push-button start trims and a remote head key (mechanical key with remote buttons) for turn-key ignition configurations. The quickest way to confirm is to check whether the car has a START/STOP button and to compare the FCC ID on your current fob. If the original is missing, the VIN and trim/equipment can help narrow the correct type, but FCC ID matching is still important.

What battery does a 2024 Hyundai Elantra key fob use?

Most 2024 Elantra fobs in the US market commonly use a CR2032 coin-cell battery. If the range suddenly drops or the car intermittently fails to detect the key, consumers generally find replacing the CR2032 resolves many issues. If problems continue after a fresh battery, the fob shell, internal contacts, or the vehicle’s antenna system may be involved.

Can a used 2024 Elantra Smart Key be reprogrammed to another car?

Often, used proximity Smart Keys are a poor bet because many are effectively “locked” to the original vehicle once registered, and late-model immobilizer systems may reject previously paired credentials. Consumers generally find that even when a used fob looks identical, it may not register due to prior pairing or mismatched internal revisions. A new or explicitly “virgin/unlocked” fob that matches the correct FCC ID is typically the safer route.

If the fob buttons work, why won’t the 2024 Elantra start?

On push-button start vehicles, starting authorization is separate from basic lock/unlock functions; a fob can sometimes operate doors but fail immobilizer authorization if it isn’t properly registered. On turn-key setups, the mechanical key may turn, but the immobilizer chip still must match the vehicle. If this happens, the issue is usually pairing/registration, a wrong key type, or (less commonly) an immobilizer/antenna fault.

What should be matched before buying a replacement key fob for a 2024 Hyundai Elantra?

At minimum, match the FCC ID, the number and layout of buttons, and whether the vehicle uses proximity push-button start or a mechanical ignition key. It’s also important to confirm the item is intended for the US market and to check whether an emergency key blade is included and needs cutting. Consumers generally find that “compatible with Elantra” listings are too broad unless the FCC ID and exact key type are confirmed.

Need Help With a Specific Situation?

🚨 Lost All Keys What to do when you've lost your only key ➕ Get a Spare Add a backup key before emergencies 🔋 Dead Battery Replace your key fob battery ⚖️ Compare Options Full comparison of all options

Related Hyundai Models

Hyundai Sonata Hyundai Kona

Need a Detailed Compatibility Report?

Get a comprehensive PDF report with exact part numbers, FCC IDs, and verified compatibility for your 2024 Hyundai Elantra.

Get Compatibility Report - $9

Instant PDF download • Money-back guarantee

Last updated: 2026-01-04